RAPID: Geochemical and Geophysical Observations of the 2015 Eruption of Volcan Momotombo, Nicaragua

RAPID：2015 年尼加拉瓜莫莫托博火山喷发的地球化学和地球物理观测

• 批准号: 1620977
• 负责人: Peter LaFemina
• 金额: $ 4.04万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1620977&HistoricalAwards=false
• 关键词: RAPID; Geochemical; Geophysical; Observations; 2015

Volcan Momotombo, Nicaragua is a basaltic to basaltic-andesite stratovolcano located along the active Central American Volcanic Arc. It last erupted in 1905. Seismic swarms have been occurring beneath Momotombo for the past year. A major seismic swarm, which included an M4.7 earthquake, began on November 24, 2015, and culminated in gas and ash eruptions beginning at 7:49 am (local time) on December 1, 2015. By the evening of December 1, Momotombo was in strombolian eruption with columns to ~1 km and lava flows flowing down the northern flank of the volcano. At this stage the Momotombo eruption appears to be characterized by both small-volume lava and small-volume tephra emissions.This RAPID funding will support a multi-disciplinary team that will travel to Nicaragua to collaborate with our INETER colleagues to: 1) install GPS instruments around the volcano and analyze existing GPS data; 2) install four broadband seismic instruments to study magma storage and migration beneath Momotombo; 3) make observations of the ongoing eruption to study the style of eruptive activity and collect tephra samples to investigate plume dynamics; 4) collect samples of tephra and lava flows for geochemical analyses; and 5) investigate precursory volcano and crustal deformation at Momomtombo using InSAR. This project leverages support from the NSF-funded COCONet project, the CEOS initiative, and existing infrastructure from previous NSF-funded projects led by members of this team.

尼加拉瓜的火山momotombo是位于活跃的中美洲火山弧的玄武岩和玄武岩和层层。它上次爆发于1905年。过去一年，地震群一直在莫莫托博（Momotombo）下发生。一支主要的地震群，包括M4.7地震，于2015年11月24日开始，并在2015年12月1日上午7:49（当地时间）开始了气体和灰烬爆发。到12月1日晚上，Momotombo在Strombolian爆发中，沿着圆柱降落到〜1公里和Lava Flow，北方北部的Volcan falland falland falland falland falland。在此阶段，莫莫托博的爆发似乎以小体积熔岩和小体积的tephra排放为特征。这一快速资金将支持一个多学科的团队，该团队将前往尼加拉瓜与我们的内特同事合作，以：1）围绕火山gps围绕现有的GPS GPS安装现有的GPS GPS数据； 2）安装四种宽带地震仪器，以研究Momotombo下方的岩浆存储和迁移； 3）观察正在进行的喷发，以研究喷发活动的样式并收集tephra样品以研究羽流动力学； 4）收集tephra和熔岩流的样品进行地球化学分析； 5）使用Insar研究Momomtombo的前寿命前火山和地壳变形。该项目利用NSF资助的椰球项目，首席执行官倡议以及由该团队成员领导的先前NSF资助的项目的现有基础架构的支持。